using SendGrid;
using SendGrid.Helpers.Mail;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
     internal class Example
     {
          private static void Main()
          {
               Execute().Wait();
          }

          static async Task Execute()
          {
               var apiKey = "SG.thBR2bwZQxqqPopMOg0...................."; // change Api Key
               var client = new SendGridClient(apiKey);
               var from = new EmailAddress("team-for...@hotmail.com", "Support");// change email
               var subject = "Sending with SendGrid is Fun";
               var to = new EmailAddress("aaaa@mail.ru", "Example User");// change email
               var plainTextContent = "and easy to do anywhere, even with C#";
               var htmlContent = "<strong>and easy to do anywhere, even with C#</strong>";
               var msg = MailHelper.CreateSingleEmail(from, to, subject, plainTextContent, htmlContent);
               var response = await client.SendEmailAsync(msg);
          }
     }
}